diff mbox series

dt-bindings: pinctrl: qcom,pmic-mpp: Fix schema for "qcom,paired"

Message ID 20230418150606.1528107-1-robh@kernel.org
State Accepted
Commit c7753ed71c160f75f92ff5679e9fc22526e56fc5
Headers show
Series dt-bindings: pinctrl: qcom,pmic-mpp: Fix schema for "qcom,paired" | expand

Commit Message

Rob Herring (Arm) April 18, 2023, 3:06 p.m. UTC
The "qcom,paired" schema is all wrong. First, it's a list rather than an
object(dictionary). Second, it is missing a required type. The meta-schema
normally catches this, but schemas under "$defs" was not getting checked.
A fix for that is pending.

Signed-off-by: Rob Herring <robh@kernel.org>
---
 Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.yaml | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

Comments

Rob Herring (Arm) April 21, 2023, 7:48 p.m. UTC | #1
On Wed, Apr 19, 2023 at 2:56 PM Krzysztof Kozlowski
<krzysztof.kozlowski@linaro.org> wrote:
>
> On 18/04/2023 17:06, Rob Herring wrote:
> > The "qcom,paired" schema is all wrong. First, it's a list rather than an
> > object(dictionary). Second, it is missing a required type. The meta-schema
> > normally catches this, but schemas under "$defs" was not getting checked.
> > A fix for that is pending.
> >
> > Signed-off-by: Rob Herring <robh@kernel.org>
> > ---
> >  Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.yaml | 5 +++--
> >  1 file changed, 3 insertions(+), 2 deletions(-)
> >
> > diff --git a/Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.yaml b/Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.yaml
> > index 9412b9362328..4c3e9ff82105 100644
> > --- a/Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.yaml
> > +++ b/Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.yaml
> > @@ -144,8 +144,9 @@ $defs:
> >          enum: [0, 1, 2, 3, 4, 5, 6, 7]
> >
> >        qcom,paired:
> > -        - description:
> > -            Indicates that the pin should be operating in paired mode.
> > +        type: boolean
> > +        description:
> > +          Indicates that the pin should be operating in paired mode.
>
> Current Linux implementation uses it as a generic pinconf param
> pinconf_generic_params which is parsed by:
>
> pinconf_generic_parse_dt_config() -> parse_dt_cfg() ->
> of_property_read_u32()
>
>
> The pinctrl-spmi-mpp.c driver, using this schema, treat it as a bool,
> but I still wonder how the code will parse bool with
> of_property_read_u32(). Maybe it should be uint32 with value of 0 and 1?

That should be an error because the length is too short so it should
go with some default from the code.

Looks like there is no user, though no property could mean keep the
default/bootloader setting. Can you sort out which type is really
desired here and hopefully we can get rid of the other type. It's not
the first case of pinctrl properties with multiple types, but we don't
really need more.

Rob
Krzysztof Kozlowski June 13, 2023, 6:48 a.m. UTC | #2
On 09/06/2023 23:34, Rob Herring wrote:
> On Fri, Apr 21, 2023 at 1:48 PM Rob Herring <robh@kernel.org> wrote:
>>
>> On Wed, Apr 19, 2023 at 2:56 PM Krzysztof Kozlowski
>> <krzysztof.kozlowski@linaro.org> wrote:
>>>
>>> On 18/04/2023 17:06, Rob Herring wrote:
>>>> The "qcom,paired" schema is all wrong. First, it's a list rather than an
>>>> object(dictionary). Second, it is missing a required type. The meta-schema
>>>> normally catches this, but schemas under "$defs" was not getting checked.
>>>> A fix for that is pending.
>>>>
>>>> Signed-off-by: Rob Herring <robh@kernel.org>
>>>> ---
>>>>  Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.yaml | 5 +++--
>>>>  1 file changed, 3 insertions(+), 2 deletions(-)
>>>>
>>>> diff --git a/Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.yaml b/Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.yaml
>>>> index 9412b9362328..4c3e9ff82105 100644
>>>> --- a/Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.yaml
>>>> +++ b/Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.yaml
>>>> @@ -144,8 +144,9 @@ $defs:
>>>>          enum: [0, 1, 2, 3, 4, 5, 6, 7]
>>>>
>>>>        qcom,paired:
>>>> -        - description:
>>>> -            Indicates that the pin should be operating in paired mode.
>>>> +        type: boolean
>>>> +        description:
>>>> +          Indicates that the pin should be operating in paired mode.
>>>
>>> Current Linux implementation uses it as a generic pinconf param
>>> pinconf_generic_params which is parsed by:
>>>
>>> pinconf_generic_parse_dt_config() -> parse_dt_cfg() ->
>>> of_property_read_u32()
>>>
>>>
>>> The pinctrl-spmi-mpp.c driver, using this schema, treat it as a bool,
>>> but I still wonder how the code will parse bool with
>>> of_property_read_u32(). Maybe it should be uint32 with value of 0 and 1?
>>
>> That should be an error because the length is too short so it should
>> go with some default from the code.
>>
>> Looks like there is no user, though no property could mean keep the
>> default/bootloader setting. Can you sort out which type is really
>> desired here and hopefully we can get rid of the other type. It's not
>> the first case of pinctrl properties with multiple types, but we don't
>> really need more.
> 
> Still an issue here. Please sort out what functionality QCom wants here.
> 
> dtschema (main br) will now throw a warning on it.

I think we can go with your patch, after double checking my previous
concerns are not relevant here - driver reads it as bool just like other
bool properties.

Best regards,
Krzysztof
Rob Herring (Arm) June 13, 2023, 1:46 p.m. UTC | #3
On Tue, Jun 13, 2023 at 12:50 AM Krzysztof Kozlowski
<krzysztof.kozlowski@linaro.org> wrote:
>
> On 18/04/2023 17:06, Rob Herring wrote:
> > The "qcom,paired" schema is all wrong. First, it's a list rather than an
> > object(dictionary). Second, it is missing a required type. The meta-schema
> > normally catches this, but schemas under "$defs" was not getting checked.
> > A fix for that is pending.
> >
> > Signed-off-by: Rob Herring <robh@kernel.org>
> > ---
>
> Linus,
> Could you take it for current fixes? The code was wrong and dtschema is
> warning now about this.

I have other things ready for 6.4, so I'll add this one.

Thanks,
Rob

>
> Fixes: f9a06b810951 ("dt-bindings: pinctrl: qcom,pmic-mpp: Convert qcom
> pmic mpp bindings to YAML")
>
>
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

>
> Best regards,
> Krzysztof
>
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.yaml b/Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.yaml
index 9412b9362328..4c3e9ff82105 100644
--- a/Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.yaml
+++ b/Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.yaml
@@ -144,8 +144,9 @@  $defs:
         enum: [0, 1, 2, 3, 4, 5, 6, 7]
 
       qcom,paired:
-        - description:
-            Indicates that the pin should be operating in paired mode.
+        type: boolean
+        description:
+          Indicates that the pin should be operating in paired mode.
 
     required:
       - pins